Web Bluetooth API 获取附近所有可用设备的列表

Question

我正在寻找可用于检索我附近所有蓝牙设备的 API 呼叫。这些示例 Web Bluetooth 讨论了从单个蓝牙设备获取不同的特性，但是我找不到任何检索所有蓝牙设备的示例（例如 windows 本机蓝牙应用程序上的可用蓝牙设备列表）。甚至支持吗？

Answer 1

我个人对网络蓝牙 API 的试验不多，但我认为您正在寻找 Device Discovery and Request Bluetooth Devices:

This version of the Web Bluetooth API specification allows websites, running in the Central role, to connect to remote GATT Servers over a BLE connection. It supports communication among devices that implement Bluetooth 4.0 or later.

When a website requests access to nearby devices using navigator.bluetooth.requestDevice, Google Chrome will prompt user with a device chooser where they can pick one device or simply cancel the request.

The navigator.bluetooth.requestDevice function takes a mandatory Object that defines filters. These filters are used to return only devices that match some advertised Bluetooth GATT services and/or the device name.

此外，这是 GATT 的列表服务.

Answer 2

A Web Bluetooth Scanning specification draft exists, but implementation isn't started 截至 2018 年的任何地方。

Answer 3

^{（好吧，这个问题让我掉进了兔子洞...）}

几年后，我们开始看到 api.Bluetooth.getDevices 的生命迹象。我最终在 Chrome.

中得到了一个实验性演示

您可能需要启用 Chrome 的“网络蓝牙实验”。（Firefox 有一个等价物，但我没试过。）

转到 chrome://flags/ 然后搜索 bluetooth 并启用 API.
单击演示页面上的按钮：Web Bluetooth / Get Devices Sample

来自同一页面的演示代码：

function onGetBluetoothDevicesButtonClick() {
  log('Getting existing permitted Bluetooth devices...');
  navigator.bluetooth.getDevices()
  .then(devices => {
    log('> Got ' + devices.length + ' Bluetooth devices.');
    for (const device of devices) {
      log('  > ' + device.name + ' (' + device.id + ')');
    }
  })
  .catch(error => {
    log('Argh! ' + error);
  });
}

function onRequestBluetoothDeviceButtonClick() {
  log('Requesting any Bluetooth device...');
  navigator.bluetooth.requestDevice({
 // filters: [...] <- Prefer filters to save energy & show relevant devices.
    acceptAllDevices: true
  })
  .then(device => {
    log('> Requested ' + device.name + ' (' + device.id + ')');
  })
  .catch(error => {
    log('Argh! ' + error);
  });
}

祝你好运！

Web Bluetooth API 获取附近所有可用设备的列表

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